Trilogy, a Planetary Geodesy Mission Concept for Measuring the Expansion of the Solar System [0.03%]
三体计划——一种测量太阳系膨胀的行星大地测量学任务概念
David E Smith,Maria T Zuber,Erwan Mazarico et al.
David E Smith et al.
The scale of the solar system is slowly changing, likely increasing as a result of solar mass loss, with additional change possible if there is a secular variation of the gravitational constant, G. The measurement of the change of scale cou...
Steven Ehlert,Aaron Kingery,Robert Suggs
Steven Ehlert
We present the results of new calibration tests performed by the NASA Meteoroid Environment Office (MEO) designed to help quantify and minimize systematic uncertainties in meteor photometry from video camera observations. These systematic u...
N V Erkaev,H Lammer,L T Elkins-Tanton et al.
N V Erkaev et al.
Latest research in planet formation indicates that Mars formed within a few million years (Myr) and remained as a planetary embryo that never grew to a more massive planet. It can also be expected from dynamical models that most of Mars' bu...
M Panchenko,H O Rucker,W M Farrell
M Panchenko
During the years 2000-2011 the radio instruments onboard Cassini, Wind and STEREO spacecraft have recorded a large amount of the Jovian decametric radio emission (DAM). In this paper we report on the analysis of the new type of Jovian perio...
Could CoRoT-7b and Kepler-10b be remnants of evaporated gas or ice giants? [0.03%]
系外行星CoRoT-7b和Kepler-10b可能是蒸发的气体或冰巨星残余体吗？
M Leitzinger,P Odert,Yu N Kulikov et al.
M Leitzinger et al.
We present thermal mass loss calculations over evolutionary time scales for the investigation if the smallest transiting rocky exoplanets CoRoT-7b (∼1.68REarth) and Kepler-10b (∼1.416REarth) could be remnants of an initially more massive ...
In situ methods for measuring thermal properties and heat flux on planetary bodies [0.03%]
原位测量天体热物性和导热量的方法
Norbert I Kömle,Erika S Hütter,Wolfgang Macher et al.
Norbert I Kömle et al.
The thermo-mechanical properties of planetary surface and subsurface layers control to a high extent in which way a body interacts with its environment, in particular how it responds to solar irradiation and how it interacts with a potentia...
T C Owen
T C Owen
The present atmosphere of Titan exhibits evidence of extensive evolution, in the form of rapid photochemical destruction of methane and a large fractionation of the nitrogen and oxygen isotopes. Attempts to recover the initial inventory of ...
Analytic investigation of climate stability on Titan: sensitivity to volatile inventory [0.03%]
泰坦气候稳定性的分析研究：易挥发物质储量的敏感性
R D Lorenz,C P McKay,J I Lunine
R D Lorenz
We develop a semiempirical grey radiative model to quantify Titan's surface temperature as a function of pressure and composition of a nitrogen-methane-hydrogen atmosphere, solar flux and atmospheric haze. We then use this model, together w...
On the volatile inventory of Titan from isotopic abundances in nitrogen and methane [0.03%]
泰坦星大气中氮和甲烷同位素丰度的变异性及其对化学的影响
J I Lunine,Y L Yung,R D Lorenz
J I Lunine
We analyze recently published nitrogen and hydrogen isotopic data to constrain the initial volatile abundances on Saturn's giant moon Titan. The nitrogen data are interpreted in terms of a model of non-thermal escape processes that lead to ...
A comparison of the atmospheres of Jupiter and Saturn: deep atmospheric composition, cloud structure, vertical mixing, and origin [0.03%]
木星和土星大气的比较：深层大气组成、云结构、垂直混合以及起源
S K Atreya,M H Wong,T C Owen et al.
S K Atreya et al.
We present our current understanding of the composition, vertical mixing, cloud structure and the origin of the atmospheres of Jupiter and Saturn. Available observations point to a much more vigorous vertical mixing in Saturn's middle-upper...